Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Recognized at Fair Value On a Recurring Basis

The fair value of these financial assets and liabilities was determined using the following inputs at June 30, 2018 and December 31, 2017:

	Fair Value Measurements at Reporting Date Using
			Quoted Prices		Significant
			In Active		Other		Significant
			Markets for		Observable		Unobservable
			Identical Assets		Inputs		Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
As of June 30, 2018:
Marketable Securities - Preferred stock	$	4,498,937	$	4,498,937	$	-0-	$	-0-
Marketable Securities - Common stock		133,564,080		133,564,080		-0-		-0-
Total	$	138,063,017	$	138,063,017	$	-0-	$	-0-
As of December 31, 2017:
Marketable Securities - Preferred stock	$	5,377,522	$	5,377,522	$	-0-	$	-0-
Marketable Securities - Common stock		127,586,754		127,586,754		-0-		-0-
Total	$	132,964,276	$	132,964,276	$	-0-	$	-0-